/Engine/Plugins/Developer/Concert/ConcertMain/Source/ConcertClient/Public/IConcertClient.h
Drop a set of repositories (and delete the files) from the server. All sessions stored in the unmounted repository will be unloaded and unreachable. The server can only drop the repository if it is not mounted or has mounted it itself.
[TFuture](API\Runtime\Core\Async\TFuture)< [FConcertAdmin_DropSessionRepositoriesResponse](API\Plugins\Concert\FConcertAdmin_DropSessionReposit-_1) > DropSessionRepositories ( const [FGuid](API\Runtime\Core\Misc\FGuid) & ServerAdminEndpointId, const [TArray](API\Runtime\Core\Containers\TArray)< [FGuid](API\Runtime\Core\Misc\FGuid) > & RepositoryIds ) const